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Prokaryotes lack membrane-bound organelles such as a nucleus and mitochondria. They are also unicellular, but they make large colonies. Think of bacteria, you never see just one bacterial cell, it is always a colony. The cell still contains DNA, but instead of being in the nucleus it is in the nucleoid. Bacteria does not mate, it engages in asexual reproduction causing each budding cell to have exact DNA. DNA is not made into chromosomes, rather it is negatively supercoiled.
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What is the correct order of the prokaryotic cell division?
The correct order of prokaryotic cell division, known as binary fission, involves several key steps. First, the DNA replicates, resulting in two identical copies. Next, the cell elongates, and the two DNA copies move to opposite ends of the cell. Finally, the cell membrane pinches inward, followed by the formation of a new cell wall, resulting in two separate daughter cells.
Which best descirbes a difference between prokaryotes and eukaryotes?
One key difference between prokaryotes and eukaryotes is that eukaryotic cells contain a nucleus enclosed within a membrane, while prokaryotic cells do not have a nucleus. Eukaryotic cells also generally have membrane-bound organelles, such as mitochondria and endoplasmic reticulum, which are absent in prokaryotic cells.
Are bacteria eukaryotic cells?
No, bacteria are not eukaryotic cells. Bacteria are classified as prokaryotic cells, meaning they lack a true nucleus and other membrane-bound organelles found in eukaryotic cells. This fundamental difference in cell structure is one of the key distinctions between bacteria and eukaryotic organisms.
What aids in diffusion and in cell recognition?
Proteins play a key role in aiding diffusion across cell membranes by acting as channels or carriers. Cell recognition is facilitated by cell surface markers such as glycoproteins and glycolipids, which help cells identify and communicate with each other.
What tool do you have to use to identify and group organisms?
A taxonomic key is used to identify and group organisms based on their characteristics such as physical features, habitats, and other distinguishing traits. It typically presents a series of dichotomous choices that lead to the identification of a specific organism or group.
What are the key features that can be observed when examining an onion cell under a microscope, and how are these features labeled for identification?
When examining an onion cell under a microscope, key features that can be observed include the cell wall, cell membrane, cytoplasm, and nucleus. These features are labeled for identification based on their distinct shapes, sizes, and locations within the cell.
What is a spider key in biology?
spider key is a diagram use to highlight or identify physical features of diagrams
What does prokaryotic and eukaryotic mean?
A prokaryotic cell is normally a bacteria. A prokaryotic cell does not have a membrane around it's nucleus, it has loops of DNA free in its cytoplasm. A eukaryotic cell is any cell with many organelles (other parts which help it function) and a membrane-bound nucleus. The nucleus is the key difference- if it has a membrane, it is Eukaryotic/a Eukaryote. If not, it is Prokaryotic/a Prokaryote.
What are the key features and functions depicted in an onion cell diagram?
An onion cell diagram typically shows the key features and functions of a plant cell, such as the cell wall, cell membrane, nucleus, cytoplasm, and vacuole. These structures play important roles in maintaining the cell's shape, protecting its contents, and carrying out essential functions like storing nutrients and controlling cell activities.
What is the correct order of the prokaryotic cell division?
The correct order of prokaryotic cell division, known as binary fission, involves several key steps. First, the DNA replicates, resulting in two identical copies. Next, the cell elongates, and the two DNA copies move to opposite ends of the cell. Finally, the cell membrane pinches inward, followed by the formation of a new cell wall, resulting in two separate daughter cells.
Identify the key features of widely used business programs?
There are a number of key features which are found in the widely used business programs. They need to be user-friendly and visual adaptive among others features.
Which observation proves that a cell is a eukatyotes?
The presence of a nucleus surrounded by a membrane is a key observation that proves a cell is a eukaryote. Eukaryotic cells also typically have membrane-bound organelles, such as mitochondria and endoplasmic reticulum, which are not found in prokaryotic cells. Additionally, eukaryotic cells are generally larger and more complex in structure compared to prokaryotic cells.
What are some of the key features of the Google Nexus cell phone?
If it's a smart phone the key features are most likely internet access and data storage. Essentially it would be designed to be as similar to a laptop as possible.
Which theory tries to explain the origin of endoplasmic reticulum nuclear membrane?
The theory of endosymbiosis which believes that nuclear membranes and organelles such as the mitochondrian have evolved from a semi"mutation" in which a prokaryotic cell was engulfed by a eukaryotic cell and instead of being digested it survived and has evolved into key features of the eukaryotic cell. Evidence for this is the fact that the mitochondrian have their own ribosomes ( of which are the prokaryotic variety) and their own DNA which allow them to make their own proteins that can be used in synthesis of adenosine triphosphate (ATP)
What are the key features of a GSM cell phone?
Key features of a GSM cell phone include the ability to make calls, send text messages, access the internet, and use various apps. GSM technology allows for global roaming and secure communication through the use of a SIM card.
Learning About the New Cell Phones for 2012?
With all the new cell phones for 2012, you may be wondering what the key differences are. These phones have a multitude of features, and it is good to know what these are. You don't want to buy a phone and then find out that a cheaper cell phone had the exact features that you wanted.
The cell anatomy and cell division review sheet 4 answers?
identify the three phases of mitosis shown in the following photomicrographs and select the events from the key choices that correctly identify each phase
